title: Clinical characteristics, morbidity, and prognostic value of concomitant coronary artery disease in idiopathic dilated cardiomyopathy.
abstract: BACKGROUND
  Patients with idiopathic dilated cardiomyopathy (dCMP) might present coronary artery disease (CAD) concomitant to dCMP and prognostic differences between ischemic heart disease and non-ischemic cardiomyopathy have been described. Clinical characteristics and prognostic implications of concomitant CAD in patients with dCMP are largely unknown.
  
  
  METHODS
  A total of 1,263 patients with chronic systolic dysfunction from dCMP-of these 67.1 % (n = 847; 72.3 % men) without and 32.9 % (n = 416; 80.8 % men) with concomitant CAD were included and baseline clinical characteristics noted. They were followed prospectively for 36.3 (20.8-65.0) months, representing 5,168 patient-years. All-cause mortality was the primary endpoint; and decompensation requiring hospitalisation as well as the combined endpoint thereof were secondary endpoints.
  
  
  RESULTS
  Independent significant predictors of CAD were smoking status (current smoker: OR 2.68, 95 % CI 1.61-4.46; p < 0.001; past smoker: OR 2.52, 95 % CI 1.40-4.52; p < 0.005; each vs. non-smoker), presence of dyslipidemia (OR 3.46, 95 % CI 2.23-5.35; p < 0.001), age (OR 1.06, 95 % CI 1.04-1.08; p < 0.001), and female sex (OR 0.49, 95 % CI 0.29-0.81; p = 0.005). The presence of CAD was not a significant predictor of all-cause mortality (adjusted HR 0.74, 95 % CI 0.36-1.54; p = 0.42), morbidity (adjusted HR 1.48, 95 % CI 0.55-3.99; p = 0.44), or the combined endpoint (HR 0.65, 95 % CI 0.24-1.78; p = 0.40).
  
  
  CONCLUSIONS
  Concomitant CAD is common in patients with dCMP. Clinical predictors of its presence are largely coincident with classic risk factors in the general population. The presence of concomitant CAD appears not to be associated with adverse prognosis (morbidity or mortality) in patients with dCMP.
authors.affiliation: Department of Cardiology, Angiology, Pulmonology, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany, Lutz.Frankenstein@med.uni-heidelberg.de.
authors.forename: Lutz
authors.initials: L
authors.lastname: Frankenstein
authors.forename: Henrik
authors.initials: H
authors.lastname: Hees
authors.forename: Tobias
authors.initials: T
authors.lastname: Taeger
authors.forename: Hanna
authors.initials: H
authors.lastname: Froehlich
authors.forename: Andreas
authors.initials: A
authors.lastname: Dösch
authors.forename: Rita
authors.initials: R
authors.lastname: Cebola
authors.forename: Christian
authors.initials: C
authors.lastname: Zugck
authors.forename: Hugo A
authors.initials: HA
authors.lastname: Katus
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D002311:Cardiomyopathy, Dilated / Q000150:complications / Q000401:mortality / Q000503:physiopathology*; D003324:Coronary Artery Disease / Q000150:complications / Q000401:mortality / Q000503:physiopathology*; D050171:Dyslipidemias / Q000453:epidemiology; D005260:Female; D005500:Follow-Up Studies; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011446:Prospective Studies; D012307:Risk Factors; D012737:Sex Factors; D012907:Smoking / Q000453:epidemiology